Note! This is a post for beginners in Kotlin language. What are lambdas and anonymous functions? In order to define them let's see what is a function literal. Function literal Function literal is a function that was not declared, but was passed as an expression.
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val sum = { a: Int, b: Int -> a + b } |
What functions are 'function literal'? The following are called 'function literal':…
In this post, I will try to explain how to write functions in Kotlin by doing a parallel with Java. It's not rocket science or anything special in this post, but this is the way I understand and remember better how to write in Kotlin, myself (it's something new to me too :) ), so…
Introduction What is Kotlin? It is a new programming language built by JetBrains, and as you may already know, Google announced at Google I/O 2017, that they will now officially support this language. It is inspired by existing languages such as Java, C#, JavaScript, Scala and Groovy. What are the advantages of using Kotlin? it's…
The mobile app market is saturated with competition. Trends turn over quickly, but no niche can last very long without several competitors jumping onto the bandwagon. These conditions result in a high failure rate across the board for the mobile app market. Only 20% of downloaded apps see users return after the first use, whereas…
Figuring out how to pull the current flavor from gradle While working on an update for one of our games, I needed to figure out how to get the current flavor and use it in code. Since there are a lot of ways to do this, I chose to create a custom build config parameter and…
Did you know you can get the signing SHA1 and MD5 fingerprints within AndroidStudio? If you need the SHA1 or MD5 fingerprints of your Android debug/release key/certificate for a new API or framework that you want to integrate in your project like Firebase or Maps, then you can also get it from AndroidStudio. Follow the steps below…
The following snippet will help you generate a random number in Java that is between 2 numbers (min and max).
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static Random random = new Random(); /** * Min is inclusive and max is exclusive in this case **/ public static int randomBetween(int min, int max) { return random.nextInt(max - min) + min; } |
Please note that the min variable is inclusive in the results of this method while max is exclusive.
In this tutorial we will create a simple app which has a NavigationView, a Toolbar with Tabs and a simple list of items, that are displayed for each selected tab. Tools used: Android Studio 2.2 Preview 4 Android Emulator 5x API 22 Project Create a new project by choosing the empty template and then click…
Problem I had to implement a Toolbar with tabs, together with CoordinatorLayout, and the content of each tab had to be a list of items, for which I used RecyclerView. But when I ran the app, the first item in the list was overlapped by the tabs, so it was not fully visible. This is how my xml…